Try soaking in acetone. (May come off even if placed in warm water if it is syrup from soda or sugar.)
Some of it is definitely a substance (evidently very hard) on the surface. And the best way for you to see if anything is under it is to remove the residue. Look forward to seeing another image after soaking.

I tried and it will not peal off, it wont even chip off, it is as hard as the coin itself, and is definitely not something that will peel off because believe me, I have tried. But thanks for your input.